Yes that is a major piece of work. I don't use the Touch framework, so it wont benefit me or EXTJS only Dev's in a tangible way. I was hoping 5.x would be where the performance issues would be finally addressed, however it sound like more more feature clutter and api changes, rather than stability and performance?

The way the market is going, all web developers will need to build touch-enabled web apps. It may seem contrary coming from someone who's still on 3.x because 4.x was too slow and unstable, but at this point I think they indeed need to focus on bringing touch into ExtJS instead of doing more perf and stability work.

The way the market is going, all web developers will need to build touch-enabled web apps. It may seem contrary coming from someone who's still on 3.x because 4.x was too slow and unstable, but at this point I think they indeed need to focus on bringing touch into ExtJS instead of doing more perf and stability work.

Windows XP is end of life April 2014
IE 6 will be supported until July 2015 (ie 6 shipped with Windows Server 2003)IE 7 will be supported until April 2017 (ie 7 shipped with Windows Vista)

However.. I agree that EXTJS 5 should not support IE 6 and for that matter it should not support IE 7 anymore. Browsers are much more transient than Operating Systems and organisations that use IE 6/7 could upgrade, should they choose to. Even large banks and government departments, which historically are very very slow to move will almost certainly have dropped IE 6 by April 2014.